On a recent evening, architect J. Meejin Yoon sat in her Leather District loft sewing mats of turf together. “I just have one more stitch,” she said.more stories like this

Several squares of grass, each about the size of an album cover, had arrived in a cooler a few days earlier. Yoon had dutifully sewn them together to create a large panel, part of a vertical garden installation called “Parti Wall, Hanging Green” to welcome the American Institute of Architects conference that begins in Boston today.